TM 5-6635-386-12&PSECTION IIRADIATION INFORMATIONWARNINGAlways wear your beta-gamma badge or TLDbadge when operating the tester and uponentering tester storage areas, and at other timesas directed by the Local Radiation ProtectionOfficer (LRPO).NOTEThere is no danger to the Army Community andthe general public when the tester is used,transported, stored, serviced and leak testedaccording to Section IV of this manual. Normalradiation exposure from a properly operatingtester is far less than the maximum alloweddosage of 1.25 rem per calendar quarter, on anaccumulated calendar year dosage of 5 rem.2-1. GOOD RADIATION PRACTICESa.Always keep in mind how close you are to thetester when it is operating. Distance from the tester isyour best precaution.(1)At any given distance, no matter how faror how close to the tester, when that distance is doubledgoing away from the tester, radiation exposure gets fourtimes weaker.(2)At any given distance, no matter how faror how close to the tester, when that distance is cut inhalf going toward the tester, radiation gets four timesstronger.(3)Always stand at least 5 feet away from thetester when it is operating.(4)Complete taking measurements as quicklyas possible.(5)You are authorized to carry the tester onlyby its handle or in its carrying case. In either instance,the handle must be locked in the SAFE position.b.A busy workday can result in as many as 30measurements. A busy workweek could result in 5 daysof extensive measurements.(1)Even with extensive use, the dose to beexpected from a properly operating and used tester isonly 1/400 of the maximum allowed dose.(2)Thirty (30) measurements per day times10 seconds per measurement equals 300 seconds or 5minutes per day of exposure at 2 feet from the tester.(3)Five (5) days times 5 minutes equals 25minutes, rounded off to 30 minutes.(4)One-half hour times 1/2 mrem/hr equalsonly 1/4 mrem exposure during a busy workweek.(5)Operators are allowed an average weeklydosage of 100 mrem.(6)Keep the curious away when you are onthe job, but dont frighten people by making it a big thing.(7)Always place the handle in the SAFEposition when the tester is not in use.(8)Store the tester under lock and key whennot in use. Only radiation protection officers andoperators shall have access to tester and carrying casekeys.(9)Make it a habit to routinely wear yourbetagamma film badge or TLD badge. Store the badgeat an approved location.(10)Do not intentionally expose the Cs 137source to air by extending it out of the tester in the 2, 4, 6or 8-inch transmission positions. Do not withdraw thesource from the measurement site before returning thehandle from the SAFE position.(11)Work fast and keep proper distancefrom the tester.2-1